> if I saw a developer who I knew to be very competent fail to quickly ramp up on a very different language in a professional setting, I probably wouldn't revis

> if I saw a developer who I knew to be very competent fail to quickly ramp up on a very different language in a professional setting, I probably wouldn't revise my assessment of them being "good." For me, it would depend on what support systems are in place. If they're asked to learn on their own with no assistance, sure this failure doesn't mean much. But if they're put in a team full of experts on the new language who are eager to help them learn, and they still fail, then yes I'd update my opinion.